High performance electrode material for supercapacitors based on α-Co(OH)2 nano-sheets prepared through pulse current cathodic electro-deposition (PC-CED)
High performance electrode material for supercapacitors based on α-Co(OH)2 nano-sheets prepared through pulse current cathodic electro-deposition (PC-CED)
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DOI：
10.1007/s13391-017-6300-9
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发表时间：
2018-01-01
影响因子：
2.4
通讯作者：
Ganjali, Mohammad Reza
中科院分区：
文献类型：
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作者：
Aghazadeh, Mustafa;Rashidi, Amir;Ganjali, Mohammad Reza
在本文中，通过阴极电合成从无添加剂的硝酸钴水溶液中制备了明确的α-Co(OH)(2)纳米片。脉冲电流阴极电沉积（PC-CED）被用作控制阴极表面上OH-电生成的手段。还通过 SEM、TEM、XRD、BET 和 IR 评估了所制备的氢氧化钴的特性和电化学行为。结果证明产物由氢氧化钴的纯α相结晶组成，具有纳米级片状形貌。对α-Co(OH)(2)纳米片电化学行为的评估表明，它们能够在3 A g(-1)的放电负载下提供1122 F g(-1)的比电容，并且在4000次连续放电循环后SC保留率为84%，这表明该纳米片是用于电化学超级电容器的有希望的候选者。此外，用于制备该化合物的方法具有放大的能力。
In this paper, the well-defined nano-sheets of alpha-Co(OH)(2) were prepared through the cathodic electrosynthesis from an additive-free aqueous cobalt nitrate bath. The pulse current cathodic electro-deposition (PC-CED) was used as the means for the controlling the OH- electrogeneration on the cathode surface. The characteristics and electrochemical behavior of the prepared cobalt hydroxide were also assessed through SEM, TEM, XRD, BET, and IR. The results proved the product to be composed of crystalline pure alpha phase of cobalt hydroxide with sheet-like morphology at nanoscale. Evaluations of the electrochemical behaviour of the alpha-Co(OH)(2) nano-sheets revealed that they are capable to delivering the specific capacitance of 1122 F g(-1) at a discharge load of 3 A g(-1) and SC retention of 84% after 4000 continues discharging cycles, suggesting the nano-sheets as promising candidates for use in electrochemical supercapacitors. Further, the method used for the preparation of the compounds enjoys the capability of being scaled up.